students=[
  ['a','b','c', [['aa', 'bb', [11, 22, 33]]]],
  ['d','f','d'] ]
# 遍历列表 - 每个元素打印出来
for students_sub in students:
    for stu in students_sub:
         print(stu)


# aa
# students[0]    # ['a','b','c', [['aa', 'bb', [11, 22, 33]]]],
# students[0][-1]  # [['aa', 'bb', [11, 22, 33]]]
# students[0][-1][0]  # ['aa', 'bb', [11, 22, 33]]
# print(students[0][-1][0][0])   #找到aa
# print(students[0][-1][0][-1][1])  #[11, 22, 33]]]]